Carbureter.



G. R. GREUTER.

GARBURETER.

ABPLIUATION FILED Aman, 1912.

1,113,551. l, Pauaentf-m001111914.

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GARBURETER. APPLICATION-FILED umso, 1912.

lill l C. R. GREUTER.

GARBURETBR. APPLICATION FILED APR, 1912. 1,1 1 3,551 Patented 001. 13, 1914.

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c. R. GREUTER.

GARBURBTER. l APPLICATION FILED APBMSO, 1912. 1,1 1 3,551. y Patented 001;.13,1914.

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SLW/hummm C. R. GREUTER.

CARBURETER.

APPLIOATION FILED umso, 1912.

v L1 1 32551., Patented oct. 13,1914- 6 SHEETS-SHEET 5.

0. R. GRBUTBR. CARBURETER.

` APPLICATION FILED APR. 30, 1912. im l yf, Patented oct. 13, 1914.

6 EETs-SHEET 6l `.unrrnn srarns Partnr .onirica ,CHARLES It.` GREUTER; 0F 4SAUGUS7 MASSACHUSETTS.

CARBURETER.

To all whom it may concern:

Be it known that I, CHARLES R. GREUTER, a. citizen of the United States, residing at Saugus, in the county of Suffolk and State of Massachusetts, have yinvented certain new and useful Improvements in Carbureters, of which the following is aspecication. y

The present invention relates to certain new land useful improvements in the construction of carbureters such as are-commonly employed for mixing and 'supplying explosive charges to internal ycombustion en gines and the like.

rlFhe object of the invention is to provide a carbureter which is formed with-a plurality of carbureting units and which embodies novel features of construction whereby the various carbureting units are brought successively into action as the engine 1s started and the suction produced thereby increased, and 4also novel means for regulating the mixture whereby the initial mixture for starting the engine is the richest, the miX- ture gradually becomingthinner until the thinnest mixture is supplied when the en gine has reached its full capacity.

A further object of the invention is to provide a carbureter which is durable and practical in its construction, which is always under the completev control of the operator, and which operates in a positive and reliable manner to automatically regulate the volume and richness of the mixture according to the requirements of the engine when the throttle is fully open.

With these and other objects in view, the invention consists incertain no-vel combinations and arrangements of parts as Will more fully appear as the description proceeds, the novel features thereof being pointed out in the appended claims.

Fo-r a full understanding of the inventionreference is to be had to the following description and accompanying drawings, in'

which g F1gure l 1s a side elevation of a carbure- -ter constructed in accordance with the inyention. Fig. 2 is a vertical sectional view showing two of the carbureting units in section. Fig. 3 is a vertical sectional view taken at substantially right angles to the section line of Fig. 2 and showing one of the carbureting units in section and. ,an-4 other of the carbureting units in side eleva- Speccationof :Letters Patent.

Patenteafoct. 13, 1914.

Application led April 30, 1912. ASerial No. 694,141.

tion. Fig. 4 is a horizontal sectional view on the line .4-4 of Fig. 1. Fig. 5 is a horizontal sectional .view on thev line 5 5 of Fig. 2. Fig. 6'is a'horizontal sectional View on the line 6-6 of Fig. 1. Fig. 7 is a detail .view of the cam mechanism vfor controlling the valve members at Vthe discharge end of certain of the carbureting units. Fig. S'is a perspective view ofthe upper end of the carbureter with .the top plate Aor. cap removed, and Fig `9 is a perspective view of the fuel nozzle and the manifold carrying the same.

Corresponding and like parts are referred to in the following description and indicated vin all the views of the drawings by the same reference characters. i

Specifically describing the present' embodiment of the invention, the numeral 1 designates a main casing within which a plurality of carbureting units is mounted, the said units being preferably of the Venturi type. These carbureting units comprise the mixing or carbureting tubes 2, 3 and 4 whichare contracted at intermediate lpoints in their lengths and gradually l`flare outwardlytoward their opposite ends. A water chamber .5 `surrounds the various mixing tubes 2, 3 and 4, and Warm water or any other suitable heating medium may be circulated through this chamber for the purpose Ofheating the carbureter. In the present instance suitable connections 6 and 7 are provided yby means of which warm waterfrom the engine jacket or any other suitable source may be circulated throughthe cham` ber 5.

The upper or discharge end of the various carburetmg units open into a common chamber 8 which is formed by a removable cap plate 9 secured to the top of the casing 1. This cap plate 9 is formed with the usual discharge vor outlet opening 10 through which the explosive mixture. passes on its way to the engine, the hsaid outlet 10 being controlled by a throttle valve 1l which is shown as of the -butterfly type. This throttle valve is applied to a shaft 12 one end of which is .providedwith an arm 13 having a set screw 14 therein for engagement with a stop lug 1-5 :to limit the closing movement of the valve. A second .arm 16 may also be provided, the said second arm being shown as integral With thearm 13 and arranged at *y an angle thereto so as to engage the opposite side of the stop lug 15 when the throttle i' valve is in a full open'position.

The carbureting'or mixing tube 2 is always in open communication with the chamber 8, while the upper ends of the carbureting ormixing tubes 3 and 4 are con- 'trolled by-the respective valves 17 and 18.

`These valves normally.` rest upon their respective seats by the action of gravity, although they are adapted to be lifted when the suction of the engine becomes sufficient for that purpose.k The valve 18 is heavier than the valve 17 so that the valve 17 will lift and throw the secondcarbureting unit into operation before valve 18 lifts to throw the ythird carbureting unit into operation.

The three carbureting units are thus' brought suxccessively into operation when the engine 1s started, thereby automatically increasing the volume of the mixture suppliedI to the engine as ybecomes necessary.

The two valves 17 and 18 may be mounted in any suitable manner, although in the present instance they1 are shown as slidably mounted upon posts 19 projecting axv ially into the upper ends of the mixing er carbureting tubes from suitable cages 20, the said cages serving to limit theupward movement of the valves.

. 'Means is also provided for positively holding the carbureter cut oif valves. 17 and 18 upon their seats when the main throttle 11 is closed, and successively releasing the -For this purpose, provided said valveas thesaid throttle 11 is opened. the .throttleshaft 12 is with a cam member 21 adapted to engage rollers 22 4upon arms 23 and 24 'which are rigid with shafts 25 and 26 jour` Vnaledin opposite sides of the supporting vrelease the arm 23 and thereby release the valve 17 and then to release the arm 24 and thereby the valve 18,b'oth of the valves being released when the ithrottleis fullyI open and the cam 21 has the position shown in Fig. 7.

Fitted to the main casing at the lower ends of the carbureting or mixing tubes is a bottom plate 29 which is formed with the pockets 30 registering with the respective carbureting tubes. This bottom plate 29 is held yieldingly in position against the bottom of the casing 1 so as'to normally form `a tight joint therewith, although the vplate is adapted to give and be forced temporarily away from the casing in the event back pressure fromthe'engine enters the carbul reter. In the present instance this plate is shown as formed lwith openings :receiving bolts 31 having coil springs' 32 mounted thereon, the said coil springs bearing against the plate and serving to hold -the plate yieldingly in position. In this manner all danger of injury to the-carbureter from back firing in the engine is avoided. Fuel nozzles 33, 34 and 35 project upwardlyinto the respective carbureting or mixing tubes 2, 3 and 4, the said nozzles or jets being carried by a manifold 35 which is arranged under the casing. Suitable air y inlet openings 36 are formed in the plate 29 and the fuel nozzles project'` through these openings. Air valves 37, 38 and 39 are slidably mounted upon tlie'respective nozzles" 33, 34 and 35 and normally drop by gravity to the lower limit of their movement where they close the respective air inlet openings 36. In practice, avery slight clearance space is preferably provided between the valves andthe sides'nofv the air inlet openings 36 so as to eliminate any danger of rattling. These air valves 37, 38 and 39 are of different lweights so as to be opened 4by varyingamounts 'of suction. It will also be noted that ythey weights of the air inlet valves vary inversely as the weights of the carbureter cut oil' valves at the upper ends `of the mixing'ftubes. The air inlet valve 37- forthe carbureter or 'xing tube 2 which isalways-'op'enat its upper end is heavier .thanfthe'air vinlet valve 38 for the carbureting or mixing tube 3, and this valve 38 is in turnheavier than the air inlet valve 39" offthe carbureting. or mixing tube 4. Whenjthe y engine is irststarting and the'mi'x'ingtubes 3 and 4 are automatically cut-off orfclosedjby the ,valves 17 and 18, a richmixture isv'furnished to the engine, owing to. vthejfact that the air inlet valve 37 which regulates the supply of air to the mixing tube2 is' heavier 'than the remaining air inlet ;v'a'.l,-vesfand admits a minimum amountjof-air."` As'l the engine gradually producesinore jsut-.tion and lifts the cut of valve 17' from'its'lseat so as to open the mixing tube j ffand `throw the second carbureting unitinto .operatiomxa slightly thinner mixturei's furnished to the engine, since the air inletl valve 38 or the mixing tube 3 is lighter than the'air'inlet vvalve 37 and admits agreater; amount of air to the mixing tube.' It lwill further-` be obvious that when pacity and liftsjthe cutof valve 18 from its seat so as to 'throw lthe third carbureting unit into operation, the thinnest mixture will be furnished .to 'the engine, since the air inlet valve `39 for `the mixing tube 4 is lighter than the air inlet valve 38 yand will` admit a still greater proportion of air fbr'ythesame amount of suction.' A construction-is 'thus the engine? reachesits full caprovided which automatically increases the volume of the charge and simultaneously decreases the richness thereof as the engine gradually reaches its greatest capacity.

A float feed chamber is arranged in the main casing 1 and extends partially around the water chamber 5. This float feed chamber ,40 communicates at one side thereof with a downwardly extending stand pipe 41 having the fuel feed pipe 42 in communication with the lower end thereof. This stand pipe 41 'is also formed with lateral openings 43 which communicate with the manifold 35. A valve stem 44 extends loosely through the pipe 41 and is provided at its lower end with a valve 45 adapted to engage a seat 46 to shut o communication between the fuel supply pipe 42 and the stand pipe 41, the valve seat 46 being located below the openings 43 so that the valve 45 does not interfere with the flow of fuel downwardly through the stand pipe 41 from the oat feed chamber 40 to the manifold 35. IA float 47 is arranged in the float chamber 40, the said float being pivoted upon a pin 48 and formed with arms 49 carrying pins 50 which engage a grooved collar 51 upon the valve stem 44. When the liquid fuel within the chamber 40 is exhausted and the float 47 drops to the position indicated by Fig. 2, the valve stem 44 is lifted so as to open the valve 45 and permit a fresh supply of fuel to pass upwardly through the stand pipe 41 into the chamber 40. As soon las the chamber becomes sufiiciently filled, the float is again Vlifted and automatically closes the valve 45. A spring 52 surrounds the upper l end of the valve stem 44 and is interposedbetween the collar 51 and a cap which is threaded upon a boss 54. This cap can be moved up and down to regulate the tension in the spring 52 and thereby regulate the operation of the float. This cap 53 is shown as having a polygonal base which is engaged by a spring arm 54, the said spring arm 1 serving to prevent accidental rotation of the cap. The manifold 35 is rigid with the main casing of the carbureter, the feed arm thereof being rigidly applied to the stand pipe 41, while a lug55 at the opposite side thereof is engaged by a stem 56 projecting downwardly from the casing 1 and passing loosely through the yieldingly mounted bottom plate 29. It will be observed that with this construction the nozzles do not take the hot fuel direct from the feed chamber 40, since the fuel must rst pass through the stand pipe 41 which is arranged upon the exterior' of the casing and completely exposed.

llaving thus described the invention, what I claim new and desire to secure by Letters Patent, isz- 1. A carbureter including a carbureting tube, means for supplying fuel to the tube,

cap plate having an air supply opening and f constituting a back-pressure relief valve.

2. A multiple carbureter includingA a casing having a plurality of Venturi tubes,

means for separately supplying fuel to the several tubes, means for separately controlling the outlet of the mixture from the several tubes, and a bottom closure for all of the tubes comprising a single yieldingly mounted cap plate having a plurality of air supply openings therein, respectively for the several tubes.

3. A carbureter including a series of car- `bureting units having differentially loaded suction controlled outlet valves, and differentially loaded suction controlled air inlet valves. f

4. A carbureter including a series of carbureting units having differentially loaded suction controlled outlet valves, and di'erentially loaded suction controlled air inlet valves, said air inlet valves being loaded in inverse relation to said outlet valves.

5. A carbureter including a series of carbureting units, means for successively opening the outlets from said units as the suction from the engine increases, and differentially loaded valves controlling the air inlet openings ofthe carbureter units, said valves being inversely related to the means for bringing the carbureter units into action to provide for thinning out the mixture as the engine approaches its greatest capacity.

6. A carbureter including a plurality of earbureter units each of which is formed with an air inlet opening and a nozzle prounits successively into action, and automatic air inlet controlling valves slidably mounted upon the nozzles, the said valves being normally closed and dierentially loaded in inverse relation to the means for permitting .the separate carbureter units to successively.

comeinto action.

7. A carbureter including a plurality of vcarbureter units, oneof the carbureter units being always in communication with the engine, cut-o valves normally closing the other carbureter units and constructed to be successively opened as the suc-tion from the engine increases, and valves controlling the air inlet openings of the carbureter units, said air inlet controlling valves being normally closed and bein constructed to require varying 'degrees of pressure to open the same, that air inlet controlling valve requiring the greatest amount of suction to open the same being associated with the carbureter unit which'is always in communication with the engine, whlle the air inlet controlling valve requiring the least n and gravity closed valves of diferent 8. A carbureter including a plurality of, `carbureter units, one of the carbureter units being always open and'ready for action, gravity actuated cut-off valves. for the remaining carbureter units, said cut-o valves being of different weights so as to be successively lifted'from their seats and opened as the suction from the engine increases,

Weights for the air inlets of the carbureter units, different amounts of suction being required to open the various air inlet controlling valves, and that air inlet controlling valve which requires the greatest suction to open the same being associated with the carbureter unit which is first brought into action, while the air inlet controlling valve requiring the least amount of suction to open the saine is associated with the carbureter unit 'which lis last brought intol action. v

9. A carbureter including a carbureting tube, a plate yieldingly applied to one end of the tube and having the air inlet opening therein, a fuelnozzle projecting through the air inlet opening, and an air inlet controlling-valve mounted upon the fuel noz-A yzle so astobe normally closed and opened when `a suflicient amount 0f suction is pron duced by theI engine, the plate being' adapted to' give and release the engine. n

10. A carbureter including a series of carbureter units, a throttle controlling the feed from all of the `carbureter units to the engine, cut-off valves normally closing a portion of the carbureter units and constructed to be openedby the suction from the engine, `positive `means for holding the cutoff* valves-upon their seats when the throttle is closed, and air inlet controlling valves for the carbureter units, the said air inlet controlling valves being constructed to be opened by varying degrees of-suction from the engine.

11. A' carbureter including a seriesof carbureter units, a throttle controlling the any back pressure from supply of explosive mixture from all of the ca-rbureter units to the engine, cut-off valves normally closing all of the carbureter `units except one, the said cut-olf valves beng arranged to be' successively opened as the suction from the engine increases, positive means for holding the cut-off valves upon their seats when the throttle is closed and successively releasing them as the throttle is Opened, and air inlet controllin valves for the carbureter units, the sai air inlet controlling valves being normally closed and being constructed to require varying degrees of suction to open the same, that air inlet controlling valve requiring the most suction to open the same being associated with the carbureter unit which is always open, while the air inletl valve requiring the least-suction to open' the same is associated with the carbureter unit whi'cli is last brought into action.

, `12. A carbureter including a plurality of carbureter units, gravity closed cut-olf .valves applied to the discharge ends of certain of the carbureter units, the said gravity closed cut-ofi" valves being all of different weights so as to be successively lifted as the suction from the engine increases, and gravity closed valves controlling the air inlets to the carbureter units, the said gravity closed air inlet controlling valves being also of dierent Weights and being arranged inversely with respect to the gravity closed cut-"oif valves, s0 that those carbureter units which are first brought into action have heavier air inlet controlling valves and supply a richer mixture than the carbureting unit which is brought last into action and which has the lightest air inlet controlling valve and supples the thinnest mixture.

13. Acarbureter including a casing formed with a feed chamber, a plurality of carbureting tubes arranged within the casing,

|rality of nozzles projecting through the air vinlet openings, the said-plate being adapted to -yield and release any back pressure from the engine, a manifold carrying the nozzles, a feed pipeextending downwardly from the feed chamber on the lexterior of the casing and communicating with the manifold, la fuel supply pipe leading to the feed pipe, and {ioat controlled valve means automatically controlling communication between the fuel supply pipe and the feed pipe.

Signed at New vYork,in the county of New York and State of New York, this 29th day of April, A. D. 1912.

CHARLES R. GREUTER. Witnesses: f

VIOLA EDITH HUGHES, EDITH MARTHA HAMiL'roN., 

